Nortel Networks BCM50 - Manual (Page 156)

156 Chapter 17 Connecting the BCM50 system to the LAN and WAN
NN40020-302
Connecting the BCM50 system to the LAN
On BCM50 and BCM50b main units, three RJ-45 connectors support LAN connections and one
OAM port. On the BCM50a, BCM50e, BCM50ba, and BCM50be main units, six RJ-45
connectors support LAN connections and one OAM port. The figure
Ports on a BCM50e main unit
on page 156 shows the location of the LAN ports.
Figure 66 Ports on a BCM50e main unit
The table LAN ports on the main unit on page 156 describes the function of each port.
Table 31 LAN ports on the main unit (Sheet 1 of 2)
Port name Function
OAM port The OAM port connects an on-site management computer to the main unit. Using this
connection, you can access management tools, such as Element Manager, without
affecting the main LAN.
This port is not connected to the network switch built into the main unit and cannot be
connected to other network devices.
LAN port The LAN port connects the main unit to the LAN.
This port connects to the network switch built into the main unit.
Expansion/LAN
ports The expansion ports have two purposes: connecting the expansion units and providing
LAN access to other network devices.
If an expansion unit is connected to the port, the expansion port provides signaling
channels, media channels, and LAN datagrams to the expansion unit. The expansion unit
connects the signaling and media channels to the media bay module (MBM) and
connects the LAN datagrams to the LAN port on the expansion unit. You can then use the
LAN port on the expansion unit to connect network devices, such as IP telephones.
If an expansion unit is not connected to the port, you can use the expansion port to
connect network devices, such as IP telephones.
The expansion ports connect to the network switch built into the main unit. Any devices
connected to these ports are on the same subnet as the device connected to the LAN
port.
LAN por
(port 1)t
Router card
LAN ports
Note: On units with an integrated ADSL modem, the
WAN port is an RJ-11 port with additional LEDs.
Expansion/
LAN ports
(ports 2, 3) OAM port
(port 0)